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- W3106111398 abstract "Many applications for topological insulators (TIs) as well as new phenomena require devices with reduced dimensions. While much progress has been made to realize thin films of TIs with low bulk carrier density, nanostructures have not yet been reported with similar properties, despite the fact that size confinement should help reduce contributions from bulk carriers. Here we demonstrate that Bi2Se3 nanoribbons, grown by a simple catalyst-free physical-vapour deposition, have inherently low bulk carrier densities, and can be further made bulk-free by size confinement, thus revealing the high mobility topological surface states. Magneto transport and Hall conductance measurements, in single nanoribbons, show that at thicknesses below 30nm the bulk transport is completely suppressed which is supported by self-consistent band-bending calculations. The results highlight the importance of material growth and geometrical confinement to properly exploit the unique properties of the topological surface states." @default.
- W3106111398 created "2020-11-23" @default.
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- W3106111398 date "2018-01-01" @default.
- W3106111398 modified "2023-10-18" @default.
- W3106111398 title "Bulk-free topological insulator Bi<sub>2</sub>Se<sub>3</sub> nanoribbons with magnetotransport signatures of Dirac surface states" @default.
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- W3106111398 doi "https://doi.org/10.1039/c8nr05500a" @default.
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